Table 2.
YT-0m | YT-N3.6m | YT-N6.7m | YT-S4m | YT-S8.8m | |
---|---|---|---|---|---|
C AND N BY EA-irMS | |||||
Total C (wt.%) | 1.79 | 2.42 | 4.71 | 3.69 | 5.78 |
δ13C of total C (‰ VPDB) | −20.11 ± 0.53 | −11.45 ± 0.3 | −11.05 ± 0.2 | −11.44 ± 0.2 | −12.09 ± 0.08 |
Total C-org (wt.%) | 1 | 0.37 | 0.56 | 0.36 | n.m. |
δ13C C-org (‰ VPDB) | −27.7 ± 0.77 | −25.08 ± 0.2 | −24.55 ± 0.3 | −25.57 ± 0.3 | n.m. |
Total N (wt.%) | 0.03 | 0.03 | 0.05 | 0.04 | 0.03 |
δ15N total N (‰ vs. air) | 2.27 ± 0.86 | 3.38 ± 0.22 | 3.23 ± 0.84 | 2.99 ± 0.43 | 2.99 ± 0.05 |
ELEMENTAL COMPOSITION BY EDX (wt.%) | |||||
C | 2.7 | 11.6 | 10.6 | 6.6 | 16.5 |
O | 35.0 | 35.9 | 35.0 | 38.2 | 36.8 |
Mg | 8.5 | 3.2 | 0.5 | 15.6 | 5.9 |
Si | 24.3 | 2.7 | n.d. | 15.1 | 1.4 |
Cl | 1.1 | 1.7 | 0.6 | 0.9 | 1.4 |
Ca | 4.5 | 44.9 | 54.0 | 17.9 | 26.1 |
Fe | 19.4 | n.d. | n.d. | 4.9 | n.d. |
MINERALOGY BY XRD | |||||
Serpentine | ✔ | ✔ | |||
Chlorite | ✔ | ||||
Montmorillonite | ✔ | ✔ | ✔ | ✔ | ✔ |
Calcite | ✔ | ✔ | |||
Aragonite | ✔ | ✔ |
n.m., not measured; n.d., not detected.